Where do worms on rotten food come from?

The "worms" are maggots (larvae of the common house fly). They come from eggs of a fly, either from when a fly lands and deposits the eggs on the food, or when the food comes in contact with eggs that have been deposited elsewhere and are brought in contact with the food in question. read more

They come from eggs of a fly, either from when a fly lands and deposits the eggs on the food, or when the food comes in contact with eggs that have been deposited elsewhere and are brought in contact with the food in question. read more

Best Answer: If there are worms that appear, that means something, probably some kind of bug, had to lay eggs. Bacteria is microscopic, so it can't lay eggs which hatch into these white worm looking things. It has to come from a bug somehow. read more

The “worms” are often maggots or fruit fly larvae. In the case of “worms” in apples, the culprit is usually the larvae (caterpillar) of the Codling Moth. In this case, the larvae tunnels into the apple to feed around the core, thus gaining food AND shelter. read more